Decoding the telephone-generated DTMF is the purpose of building the DTMF decoder 2 which can be connected directly to a serial port and use a HyperTerminal on a PC to view the digits. A 16×2 LCD ...

The objective of the project is to decode dual tone codes into digits which are later interpreted by microcontroller. This device is very useful for decoding Dual Tone Multi Frequency (DTMF) generated ...